EP2465617B1 - Procédé et dispositif de séparation de fines particules à partir de produits en vrac en forme de granulés dans une conduite tubulaire - Google Patents

Procédé et dispositif de séparation de fines particules à partir de produits en vrac en forme de granulés dans une conduite tubulaire Download PDF

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Publication number
EP2465617B1
EP2465617B1 EP11009561.9A EP11009561A EP2465617B1 EP 2465617 B1 EP2465617 B1 EP 2465617B1 EP 11009561 A EP11009561 A EP 11009561A EP 2465617 B1 EP2465617 B1 EP 2465617B1
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Prior art keywords
cleansing
air
pipeline
product
cleaning
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EP11009561.9A
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German (de)
English (en)
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EP2465617A1 (fr
Inventor
Guido Winkhardt
Michael Heep
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Zeppelin Systems GmbH
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Zeppelin Systems GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents

Definitions

  • the invention relates to a method and a device for the separation of fines (particles, threads, nests or dust) from granular bulk materials, which are conveyed in a pipeline.
  • Examples are mechanical, pneumatic, hydraulic, electrostatic, thermal, chemical, biological and optical cleaning processes.
  • sieving represents a simple separation of coarse material and fine material.
  • Pneumatic cleaning processes are, for example, air classification (separation of wheat grain and husk) and countercurrent separation.
  • DE 41 13 285 A1 it is a filter, in which it is not possible to integrate the classifier or separator as an integral part in a pipeline, because downstream of the filter separator shown there, a delivery line termination is arranged.
  • the solid is in this case completely separated from the conveying gas, which is done by the aforementioned pipeline termination, and thus it is not possible to integrate such an arrangement in a pipeline for the transportation of feed of feed.
  • DE 3327461 discloses a separator for pneumatic bulk material.
  • the invention has for its object to form a separator according to the preamble of claim 1 so that it can be integrated directly into a pipeline for the promotion of a feed material, which is conveyed in the form of a pneumatic conveying along the pipeline.
  • the method is characterized by the technical teaching of claim 1.
  • a device is characterized by an independent subsidiary claim.
  • An essential advantage of the technical teaching is that there is now no need for regulated or uncontrolled conveyance of material or conveyed material or pressure maintenance (for example with the aid of a lock) in the vicinity of the separator, as was the case in the prior art. This undesirably affected the pneumatic conveyance of the bulk flow.
  • the granules From the feed line the granules enter either along the central axis in the pipe sifter or perpendicular to the central axis (shown here with a Disperger). The granules must be distributed well dispersed on a ring cross-section. After cleaning in the ring cross section, the purified product stream is collected in a cone and added back to the delivery line.
  • the product stream on the input side contains conveying gas, granulate content and fine fraction.
  • the fine fraction contains particles, threads, nests or dust.
  • the fines content of the product stream on the outlet side depends on the separation efficiency of the classifier.
  • the amount of cleaning air is provided via an air generator.
  • the fines are removed from the recycle gas stream via a separator (eg filter or cyclone).
  • the amount of cleaning air passes into a sealed against the product flow inner body, which is distributed on the circumference, the wall of the inner body passing through, has cleaning openings. Through these openings, the amount of cleaning air enters at a certain angle to the product flow (conveying gas, granulate content & fines) and passes through this product flow.
  • the change in this curve for the lighter product flow components compared to the flight curve of the heavier granule parts is used for their separation from the conveyed.
  • the dimensioning of the cleaning openings, as well as their angle to the conveying air flow can be designed individually depending on the product. It can both the direction and the opening cross section are changed. Likewise, nozzle-like inserts can be arranged in the cleaning openings.
  • the amount of cleaning air flows through the product flow in the ring cross-section and passes through a radially outside of the ring cross-section attached, air-tightly connected to the cleaning air, ring jacket in the exhaust air line.
  • fine particles or filaments or nests of threads are entrained, blown into the radially outer ring jacket, collected there and deposited as laden cleaning air in a separator.
  • the inert granules can not be entrained by the cleaning air blowing obliquely or at right angles into the product stream. They essentially maintain their trajectory.
  • the pipe sifter 1 is used for the deposition of fines (fine particles or monofilaments or nests of threads or dust) of granular bulk materials from a pipeline, preferably within a pneumatic conveying line.
  • the pipe sifter 1 can be installed at any point of the delivery line.
  • the piping classifier 1 does not require pressure limitation or mass flow control (e.g., in the form of a rotary valve) directly on its product stream inlet side 3 or product stream outlet side 4. It may be installed horizontally or vertically.
  • pressure limitation or mass flow control e.g., in the form of a rotary valve
  • the pipe sifter is designed aerodynamically and has only a small size.
  • the product stream 3 passes either longitudinally, obliquely or perpendicular to the central axis 5 in the pipe sizer 1.
  • the granules must be well dispersed on a ring cross-section 6 distributed.
  • the ring cross-section 6 has a larger diameter than the pipe 2.
  • the increase in diameter of the annular cross-section 6 with respect to the diameter of the pipe 2 is in the range between 10 to 500% of the diameter of the pipeline.
  • the annular cross section 6 is formed by the enlarged diameter tubular jacket 40 of the pipe 2, while the inner circumferential surface is formed by the outer periphery of the inner body 14.
  • the cleaned product stream 4 is collected in a cone 7 of the pipe sifter 1 located downstream of the cleaning level 16 and re-added to the pipe 2.
  • the amount of cleaning air 9 is provided via an air generator 10 (eg fan). Dust and granules are removed from the recycle gas stream 12 via a separator 11 (eg filter or cyclone).
  • This cleaning circuit 13 can operate at different pressure levels. The self-adjusting pressure level is dependent on the pressure at the installation of the pipe sifter. 1
  • a closed and thus gas-tight inner body 14 has at the periphery distributed cleaning openings 15 which break through the jacket of the inner body 14.
  • the cleaning air 9 can enter or exit. Both directions of flow of the cleaning air 9 are possible (see the Figures 9 and 10 ).
  • the cleaning air 9 will flow out of the inner body 14 through the cleaning openings 15 into the annular cross-section 6 in the region of the cleaning plane 16 (see FIG FIG. 1 and 7 ) and there meet at an angle to the axial product flow 18.
  • this variant will be described in more detail below.
  • the inner body 14 has one or more feeds in the form of an inlet nozzle through which the cleaning air 9 can be supplied or removed.
  • the dimensioning of the inner body 14 and the cleaning openings 15 can be designed individually for each product.
  • the optional operation with an acceleration air amount 20 is possible.
  • a part of the cleaning air quantity 9 is branched off and the conveying air 21 is supplied close to the product inlet 3. This portion is returned to the cleaning circuit 13. This is in FIG. 3 shown.
  • FIG. 4 shows as a further variant that the control element 22 'can also be arranged on the suction side of the air generator.
  • the in the FIGS. 2 to 4 shown separator 11 may be formed as a filter or cyclone.
  • the active principle of the present invention is that the feed material 33, which is conveyed in flight promotion in a pipeline 2, is radially split in the region of the central longitudinal axis 5 of the pipe classifier 1, thus in a ring cross-section 6 of larger diameter on the outer circumference of an enlarged inner diameter body 14 to be directed.
  • the radial splitting of the feed material 33 takes place by means of an end-side cone 38, which is arranged on the end face of the approximately cylindrical inner body 14, which serves only the air flow of the feed material 33 and the lateral surface of which forms the radially inner boundary of the annular cross-section 6.
  • the outer boundary of the annular cross section 6, in which the feed material 33 to be cleaned is conveyed, is formed by an outer casing of the pipe sifter 1, which is designed as an annular ring 17 enlarged in diameter.
  • the feed material 33 flows radially in the annular cross-section 6, which are typical for the flight promotion gas velocities of z. B. in the range 18 to 40 meters per second. This speed is product dependent.
  • the invention is not limited to that the pipe 2 coincides in alignment with the central longitudinal axis 5 of the pipe sifter 1.
  • the feed material 33 at an angle of z. B. 90 degrees or at other angles, which are inclined to the center longitudinal axis 5, is entered.
  • a cleaning air stream of cleaning air 9 passes through the so-called annular product curtain Massengutstrom at least at a certain angle to the flow direction of the Massengutstromes, so the lighter product flow components (fines: particles, filaments, nests or dust) from the Massengutstrom out radially outward directed to convey and in the area of an outside of the ring cross-section 6 of the Pipe sifter 1 subsequent annular jacket 17 to convey, which is penetrated by the cleaning air 9 approximately perpendicular.
  • the invention is not limited to that the cleaning air flows radially from the inside out into the feedstock to be cleaned, after the FIG. 10 the reverse flow direction shows.
  • the cleaning air flows radially from outside to inside the feed material and thus the cleaning air flow is carried on the inside of the pipe sifter and not on the outside, as shown in the later drawings ( FIG. 10 ) is described in more detail.
  • the cleaning air 9 is circulated, wherein the cleaning air 9 flows in the direction of arrow 37 in the return gas flow 12 of a cleaning circuit 13 and is introduced in the direction of arrow 23 via an inlet port on one side of the pipe sifter 1.
  • the thus cleaned feed material flows through the ring cross-section 6 as purified product stream 4 via a conically widening annular nozzle 8 on the outer circumference of the annular cross-section 6 and arrives in the direction of arrow 26 second cone 7, where the thus purified product stream 4 is returned in the form of a flight promotion in the pipeline 2.
  • the conically widening radially outward shaping of the annular nozzle 8 provides an improved "catching power" - less contour - for the effluent through the annular nozzle 8, purified product stream.
  • the invention is not limited to the integration of a pipe sifter 1 in a pressurized pipeline 2, but also relates to pipe sifter 1, which work together with a negative pressure in the pipeline 2.
  • the cleaning circuit 13 is open, which means that it is not designed as a closed circuit, but that the cleaning air 9 in the in FIG. 1 shown nozzle blown in the direction of arrow 23 and flows freely from the output side arranged nozzle as a return gas stream 12 in the direction of arrow 25 without the return gas stream 12 is collected in any way. So it can take place a free blowing into the atmosphere.
  • the invention relates to a pipe sifter 1, which can be used both in a negative pressure or pressure relief with respect to the pipe 2.
  • FIG. 5 schematically a cleaning in the pipe sifter 1 is shown.
  • the feedstock 33 is guided as a product curtain in the annular cross section 6 along the outer circumference of the inner body 14 in the direction of arrow 26, wherein the feedstock 33 of granules 28 and thus blended and separated particles 29 and threads 30 consists.
  • the cleaning air 9 flows in the direction of arrow 19 in the interior of the inner body 14 and flows in the region of the wall of the inner body 14 by breaking cleaning openings 15 in the annular cross-section 6 inside.
  • the size of the cleaning openings 15 and their dimensions determines the speed of the air flow, which blows in the direction of arrow 19 through these cleaning openings in the annular cross-section 6 of the pipe sifter.
  • the size of these cleaning openings 15 and their dimensions are variable within wide limits.
  • the annular cross-section 6 is interrupted by the cleaning openings 15 extending over the entire outer circumference on the outer circumference of the inner body 14 over an angle of 360 degrees so as to form the cleaning plane 15 arranged therein.
  • the cleaning openings are thus designed as an open ring cross-section.
  • struts and other bridging means for axially bridging the open ring cross-section are present in order to avoid complete separation of the lateral surface of the inner body 14.
  • cleaning openings 15, for example are distributed uniformly at a distance on the outer circumference of the inner body 14. are arranged as perforations or slot openings in the lateral surface of the inner body 14.
  • the shaping of the cleaning openings can be slit-shaped, cylindrical and in any other contour.
  • outflow apertures can be used which ensure a certain orientation of the cleaning air 9 in the annular cross-section 6.
  • these outflow openings can be formed as nozzle openings to allow an increase in the flow velocity of the outflowing from these nozzle openings cleaning air 9.
  • FIG. 6 various possibilities of air guidance of the cleaning air flow from the inside of the inner body 14 through the cleaning openings 15 are shown.
  • the cleaning air flow flows in the direction of arrows 19 coming from the inside of the inner body 14 coming through the cleaning openings 15, and depending on the steering of the cleaning air flow, he is either z. B. directed in the direction of arrow 24 obliquely against the inflowing in the direction of arrow 26 product stream 8, or it can also be directed in other angular directions, as shown by the direction of the arrow 24 '.
  • an offset 36 may be provided.
  • the offset can be offset to the left or to the right.
  • the FIG. 6 shows a left offset 36.
  • the left side offset means that the offset is located upstream of the bulk flow. However, it can also be downstream.
  • FIG. 7 shows various ways of guiding the cleaning air flow, where various possible angular positions are shown.
  • the cleaning air flow will flow in the radial direction (90 degrees) in the direction of arrow 24 through the cleaning openings into the annular cross-section 6 and there approximately meet in the vertical direction to be cleaned mass flow (feed material 33).
  • the invention is not limited thereto.
  • the invention shows that the cleaning air 9 can also be directed in the directions of the arrows 24 ', 24 ", 24''' and 24 '''', resulting in angular positions in the range between 0 degrees and 180 degrees as shown in FIGS FIG. 7 is shown schematically.
  • different arrow directions 37 ', 37 "and 37' '' are shown, in which the cleaning air flow, which now carries the fines, flows out as a return gas flow 12.
  • the FIG. 8 shows as a further embodiment, conically widening to the flow direction of the product stream 3 widening cleaning openings 15.
  • the inner body 14 is divided into two with respect to the inner body 14 extending over the circumference cleaning openings. It forms a first cylindrical hollow body upstream of the cleaning openings 15 with a smaller diameter than comparatively the second part of the inner body, which merges downstream of the cleaning openings 15 in a larger diameter.
  • the cleaned product stream 4 receiving annular nozzle 8 is enlarged in diameter relative to a ring nozzle 8 after FIG. 1 , It is thus achieved a lesser outline inußrCenterden product stream 3, because a flow of the product stream 18 is oblique to the longitudinal axis of the annular cross-section 6.
  • FIG. 9 shows the structure of the pipe sifter 1 according to the FIG. 1 , wherein the different flow directions are shown to clarify the function.
  • FIG. 10 shows the kinematic reversal of the leadership of the cleaning air flow of the cleaning air 9 compared to FIG. 1 and 9 ,
  • the leadership of the cleaning air flow from radially outside to radially inside.
  • the cleaning level 16 is thus laid in the interior of the inner body 14.
  • the method according to the invention is thus distinguished by the fact that the product stream 3 is radially spread on a ring cross-section 6 on the input side of a pipe sifter integrated in the pipeline and there in the region of a cleaning plane 16 from an angle to the direction of the spread product stream.
  • 3 flowing cleaning air stream 9 is interspersed, which deflects the entrained in the product stream 3, lighter particles, threads, nests, dust or the like. From the trajectory of the heavier granules and promotes in a flowed through by the cleaning air 9 ring jacket 17, from which they by means of a separator 11th or cyclones are removed.
  • a first embodiment provides that the cleaning air stream 9 passes through the product stream 3 at an angle from radially inward in the direction radially outward and thus deflects the lighter particles from their trajectory into a radially outer annular jacket 17, through which the cleaning air flows.
  • the cleaning air stream 9 the product stream 3 at an angle from radially outward direction radially inward passes through and thus deflects the lighter particles from their trajectory in a radially inner annular jacket 17, which is traversed by the cleaning air.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Cyclones (AREA)

Claims (12)

  1. Procédé pour séparer des fines particules (29, 30) à partir de produits en vrac en forme de granulés (3, 18, 33) qui sont acheminés sous forme d'écoulement de produit (3) dans une conduite tubulaire (2) à l'aide d'un acheminement à suspension ou à dunes, caractérisé en ce que l'écoulement de produit (3), sur le côté entrée d'un séparateur tubulaire (1) intégré de manière étanche à l'air dans la conduite tubulaire, est dispersé radialement pour atteindre une section transversale annulaire (6) et, là, est traversé dans la zone d'un plan de séparation (16) par un écoulement de purification (9) qui s'écoule suivant un certain angle par rapport au sens de l'écoulement de produit (3) dispersé, qui dévie de la trajectoire des particules de granulés plus lourdes les particules plus légères, fils, poches, poussières ou autres entraînés dans l'écoulement de produit (3), et qui les amène dans une enveloppe annulaire (17), traversée par l'air de purification (9), d'où ils sont éliminés à l'aide d'un séparateur (11) (par exemple un cyclone).
  2. Procédé selon la revendication 1, caractérisé en ce que l'air de purification (9) traverse le séparateur tubulaire (1) en circuit fermé.
  3. Procédé selon la revendication 1, caractérisé en ce que l'air de purification (9) traverse le séparateur tubulaire (1) en une trajectoire d'écoulement ouverte.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que pour former une quantité d'air d'accélération (20) dans la zone de purification (16), une partie de la quantité d'air de purification (9) est déviée et amenée vers l'air d'acheminement (21) près de l'entrée de produit (3) (fig. 3) .
  5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'une purge partielle d'air d'acheminement a lieu à l'aide d'un organe de régulation (22) par l'intermédiaire du circuit d'air de purification (13), moyennant quoi la quantité d'air d'acheminement est réduite à la sortie du produit (fig. 4).
  6. Séparateur de conduite (1) pour séparer des fines particules (29, 30) à partir de produits en vrac en forme de granulés (3, 18, 33) qui sont acheminés en un écoulement de produit (3) dans une conduite tubulaire à l'aide d'un acheminement à suspension ou à dunes, caractérisé en ce qu'il est disposé de manière étanche à l'air dans la conduite (2) et se compose d'une double enveloppe (14, 40) qui est élargie par rapport au diamètre de la conduite (2) et qui forme un espace annulaire (6) qui s'étend dans le sens axial et à travers lequel passe, l'écoulement de produit à purifier (3), en ce que l'espace annulaire (6) est interrompu par un plan de purification radial (16) qui s'étend sur la périphérie de l'espace annulaire et à travers lequel de l'air de purification (9) est injecté dans l'écoulement de produit (3) suivant un certain angle par rapport au sens d'acheminement dudit écoulement de produit (3), et en ce qu'il est prévu, radialement vers l'extérieur du plan de purification (16), une enveloppe annulaire (17) qui entoure l'espace annulaire (6), qui reçoit l'air de purification (9) et qui l'amène dans un séparateur (11) ou un cyclone.
  7. Séparateur de conduite (1) selon la revendication 6, caractérisé en ce que l'espace annulaire (6) est formé radialement vers l'intérieur par la surface d'enveloppe d'un corps intérieur (14) qui présente, réparties sur sa circonférence, des ouvertures de purification (15) qui traversent l'enveloppe du corps intérieur (14) et par lesquelles l'air de purification (9) est apte à être introduit dans l'écoulement de produit suivant un certain angle par rapport à l'écoulement de produit (matériau de chargement 33).
  8. Séparateur de conduite (1) selon l'une des revendications 6 ou 7, caractérisé en ce que la dispersion radiale de l'écoulement de produit (3) se fait grâce à un cône (38) qui est disposé côté frontal sur le corps
    intérieur (14) et qui forme avec un cône parallèle de la conduite (2) la section transversale annulaire (6).
  9. Séparateur de conduite (1) selon l'une des revendications 6 à 8, caractérisé en ce qu'après la purification du matériau de chargement (33) (franchissement du plan de purification 16), le matériau de chargement purifié est apte à être ramené dans la conduite (2), par un second cône (7), sous forme d'écoulement de produit purifié (4) .
  10. Séparateur de conduite (1) selon l'une des revendications 6 à 9, caractérisé en ce que l'air de purification (9) est apte à être orienté radialement vers l'extérieur, en arrivant radialement vers l'intérieur, dans l'écoulement de produit à purifier (3, 33).
  11. Séparateur de conduite (1) selon l'une des revendications 6 à 9, caractérisé en ce que l'air de purification (9) est apte à être orienté radialement vers l'intérieur, en arrivant radialement vers l'extérieur, dans l'écoulement de produit à purifier (3, 33) (fig. 9) .
  12. Séparateur de conduite (1) selon l'une des revendications 6 à 11, caractérisé en ce que l'espace annulaire (6) qui achemine le matériau de chargement (3, 33) est décalé radialement vers l'extérieur en aval des ouvertures de purification (15), pour une section transversale d'acheminement à peu près constante (fig. 8).
EP11009561.9A 2010-12-17 2011-12-02 Procédé et dispositif de séparation de fines particules à partir de produits en vrac en forme de granulés dans une conduite tubulaire Active EP2465617B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010054849A DE102010054849A1 (de) 2010-12-17 2010-12-17 Verfahren und Vorrichtung zur Abscheidung von feinen Partikeln aus granulatförmigen Schüttgütern in einer Rohrleitung

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EP2465617A1 EP2465617A1 (fr) 2012-06-20
EP2465617B1 true EP2465617B1 (fr) 2013-05-01

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EP (1) EP2465617B1 (fr)
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EP3434379A1 (fr) 2017-07-24 2019-01-30 Zeppelin Systems GmbH Procédé et dispositif de séparation de particules fines dans un séparateur plat

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CN104190622B (zh) * 2014-08-24 2017-05-03 浙江可可佳食品有限公司 用于果肉或果粒生产的振动筛分机系统
CN106179962A (zh) * 2016-08-26 2016-12-07 鞍钢实业微细铝粉有限公司 一种利用系统负压方式吸收并降低外部粉尘的作业方法
CN110435038B (zh) * 2019-09-12 2020-07-28 东莞市三润塑胶科技有限公司 一种塑料造粒后处理工艺
CN113245197A (zh) * 2021-05-20 2021-08-13 福建师范大学 一种生物反应和生物分离装置
CN114870537A (zh) * 2022-06-14 2022-08-09 江西乾照光电有限公司 过滤除尘器及过滤除尘系统
CN115055475B (zh) * 2022-07-18 2024-07-23 中冶赛迪技术研究中心有限公司 一种变工况下除尘管路防积尘装置及方法

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US20120168356A1 (en) 2012-07-05
EP2465617A1 (fr) 2012-06-20
US8770411B2 (en) 2014-07-08
DE102010054849A1 (de) 2012-06-21

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